Outside court, Sabrina Moss's parents Andrea and John thanked police for bringing their daughter's murderers to justice.
Sabrina was beautiful, loving, caring. She was a larger-than-life character, the fullness of which cannot be summarised in one statement. We miss everything about her.
She was simply irreplaceable.
Our lives will forever be affected.
More top news
Scotland Yard said the male youths will appear in custody at Westminster Magistrates' Court on Saturday.
The family of Oliver Dearlove urged people to "think again" before using their fists, as the man who killed him began a six-year jail term.
London Fire Brigade took Southwark Council to court on four charges in relation to safety breaches at Lakanal House in Camberwell.